TY - GEN
T1 - Improved suppression algorithm of digital narrowband interference in FFT domain
AU - Caijie, Xia
AU - Jianping, An
AU - Yongzheng, Guo
AU - Aihua, Wang
PY - 2007
Y1 - 2007
N2 - An adaptive FFT method for suppressing digital narrowband interferences based on double threshold is proposed in DSSS communications. The proposed algorithm utilized the threshold parameter of consecutive mean exciser (CME) to set a high and low threshold. First, the lower threshold groups the adjacent samples above the lower threshold into the same group, called as a cluster. The largest element of a cluster is compared with the upper threshold. If the largest element exceeds the upper threshold, it is decided that the cluster corresponds to a NB signal, while if the largest sample is below the upper threshold, the cluster corresponds to the noise and possible desired signal. Theoretical analysis shows the importance of the double threshold, which avoids the BER performance degrades at low JSRs. Numerical simulations show the exactness of the theoretical analysis and the validity of the proposed method.
AB - An adaptive FFT method for suppressing digital narrowband interferences based on double threshold is proposed in DSSS communications. The proposed algorithm utilized the threshold parameter of consecutive mean exciser (CME) to set a high and low threshold. First, the lower threshold groups the adjacent samples above the lower threshold into the same group, called as a cluster. The largest element of a cluster is compared with the upper threshold. If the largest element exceeds the upper threshold, it is decided that the cluster corresponds to a NB signal, while if the largest sample is below the upper threshold, the cluster corresponds to the noise and possible desired signal. Theoretical analysis shows the importance of the double threshold, which avoids the BER performance degrades at low JSRs. Numerical simulations show the exactness of the theoretical analysis and the validity of the proposed method.
KW - BER
KW - Consecutive mean excision
KW - Double threshold
KW - FFT
KW - Threshold parameter
UR - http://www.scopus.com/inward/record.url?scp=38049053082&partnerID=8YFLogxK
U2 - 10.1109/WICOM.2007.265
DO - 10.1109/WICOM.2007.265
M3 - Conference contribution
AN - SCOPUS:38049053082
SN - 1424413125
SN - 9781424413126
SN - 1424413125
SN - 9781424413126
T3 - 2007 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2007
SP - 1036
EP - 1039
BT - 2007 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2007
T2 - 2007 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2007
Y2 - 21 September 2007 through 25 September 2007
ER -